Uplink power headroom definition for E-DCH in CELL—FACH

Abstract

Systems and methodologies are described that facilitate reporting an uplink power headroom (UPH) during an E-DCH transmission in a CELL_FACH state. For a E-DCH transmission, a reduced measurement period can be utilized in order to report a UPH measurement. In particular, the reduced measurement period can be less than 100 milliseconds. The UPH measurement can be communicated based upon receipt of AICH/E-AICH and transmission of DPCCH for a configurable number of radio frames. The UPH measurement can be based upon the transmitted power prior to actual data transmission. Additionally, the UPH measurement can be included within scheduling information portion of a MAC header.

1. A method that facilitates delivering an Uplink Power Headroom (UPH) measurement associated with an enhanced dedicated channel (E-DCH) transmission in a CELL_FACH state, comprising:
 transmitting a portion of a physical random access channel (PRACH) preamble upon receipt of an acquisition indication channel (AICH); 
 communicating a dedicated physical control channel (DPCCH) for a configurable radio frame; 
 evaluating a transmitted power level for a user equipment (UE) prior to a data transmission associated with E-DCH; and 
 incorporating the UPH measurement within a scheduling information (SI) portion of a header, wherein the incorporation is based at least in part upon the evaluated transmitted power level for the E-DCH transmission. 
 
     
     
       2. The method of  claim 1 , further comprising reporting the SI portion of the header to at least one of a base station, a serving base station, a target base station, a network, a server, or an eNode B. 
     
     
       3. The method of  claim 1 , wherein the header is a medium access control (MAC) header. 
     
     
       4. The method of  claim 1 , further comprising utilizing the SI portion of the header to identify a UPH measurement for a user equipment. 
     
     
       5. The method of  claim 1 , further comprising receiving a request to report the UPH measurement based upon a reduced measurement period, wherein the reduced measurement period is less than 100 milliseconds. 
     
     
       6. The method of  claim 1 , further comprising ascertaining whether a DPCCH preamble is configured. 
     
     
       7. The method of  claim 6 , further comprising reporting a previous transmitted preamble power prior to receiving the AICH if no DPCCH preamble is configured. 
     
     
       8. The method of  claim 7 , further comprising utilizing the previous transmitted preamble power is the transmitted power for a previous data transmission, wherein the previous transmitted power is a last transmitted PRACH preamble power. 
     
     
       9. The system of  claim 1 , further comprising utilizing the UPH measurement with a MAC-e scheduler to schedule the UE. 
     
     
       10. The system of  claim 1 , further comprising utilizing the UPH measurement with a MAC-e scheduler to employ at least one of the following:
 a reduction in time for the E-DCH transmission; 
 a decrease of a collision probability of an E-DCH resource; or 
 a decrease of a blocking probability of an E-DCH resource. 
 
     
     
       11. A wireless communications apparatus, comprising:
 at least one processor configured to:
 transmit a portion of a physical random access channel (PRACH) preamble upon receipt of an acquisition indication channel (AICH); 
 communicate a dedicated physical control channel (DPCCH) for a configurable radio frame; 
 evaluate a transmitted power level for a user equipment (UE) prior to a data transmission; 
 incorporate the UPH measurement within a scheduling information (SI) portion of a header, wherein the incorporation is based at least in part upon the evaluated transmitted power level for the E-DCH transmission; and 
 
 a memory coupled to the at least one processor. 
 
     
     
       12. The wireless communications apparatus of  claim 11 , further comprising at least one processor configured to report the SI portion of the header to at least one of a base station, a serving base station, a target base station, a network, a server, or an eNode B. 
     
     
       13. The wireless communications apparatus of  claim 11 , further comprising at least one processor configured to utilize the SI portion of the header to identify a UPH measurement for a user equipment. 
     
     
       14. A wireless communications apparatus that enables delivering an Uplink Power Headroom (UPH) measurement associated with an enhanced dedicated channel (E-DCH) transmission in a CELL_FACH state, comprising:
 means for transmitting a portion of a physical random access channel (PRACH) preamble upon receipt of an acquisition indication channel (AICH); 
 means for communicating a dedicated physical control channel (DPCCH) for a configurable radio frame; 
 means for evaluating a transmitted power level for a user equipment (UE) prior to a data transmission; and 
 means for incorporating the UPH measurement within a scheduling information (SI) portion of a header, wherein the incorporation is based at least in part upon the evaluated transmitted power level for the E-DCH transmission. 
 
     
     
       15. The wireless communications apparatus of  claim 14 , further comprising means for reporting the SI portion of the header to at least one of a base station, a serving base station, a target base station, a network, a server, or an eNode B. 
     
     
       16. The wireless communications apparatus of  claim 14 , further comprising means for utilizing the SI portion of the header to identify a UPH measurement for a user equipment. 
     
     
       17. The wireless communications apparatus of  claim 14 , further comprising means for receiving a request to report the UPH measurement based upon a reduced measurement period, wherein the reduced measurement period is less than 100 milliseconds. 
     
     
       18. A non-transitory computer-readable medium encoded with computer executable instructions comprising: code for causing at least one computer to transmit a portion of a physical random access channel (PRACH) preamble upon receipt of an acquisition indication channel (AICH); code for causing at least one computer to communicate a dedicated physical control channel (DPCCH) for a configurable radio frame; code for causing at least one computer to evaluate a transmitted power level for a user equipment (UE) prior to a data transmission; and code for causing at least one computer to incorporate the UPH measurement within a scheduling information (SI) portion of a header, wherein the incorporation is based at least in part upon the evaluated transmitted power level for the E-DCH transmission. 
     
     
       19. A method that facilitates receiving an Uplink Power Headroom (UPH) measurement for a user equipment (UE) in CELL_FACH, comprising:
 detecting an enhanced dedicated channel (E-DCH) transmission in a CELL_FACH state; 
 utilizing a reduced measurement period to calculate the UPH measurement associated with the E-DCH transmission within CELL_FACH, wherein the reduced measurement period is less than 100 milliseconds; 
 requesting the UPH measurement from the UE based upon the reduced measurement period; and 
 evaluating a received portion of scheduling information (SI) within a header to identify the requested UPH measurement. 
 
     
     
       20. The method of  claim 19 , further comprising defining the UPH measurement as an average value of the UE transmission power headroom over the reduced measurement period. 
     
     
       21. The method of  claim 19 , further comprising utilizing a measurement period of 100 milliseconds to calculate the UPH measurement for a non-CELL_FACH state transmission. 
     
     
       22. The method of  claim 19 , further comprising utilizing a measurement period of 100 milliseconds to calculate the UPH measurement for a non-E-DCH transmission. 
     
     
       23. The method of  claim 19 , further comprising receiving a PRACH preamble from the UE. 
     
     
       24. The method of  claim 23 , further comprising transmitting an AICH to the UE. 
     
     
       25. The method of  claim 24 , further comprising receiving a DPCCH for a configurable radio frame. 
     
     
       26. The method of  claim 25 , further comprising utilizing a headroom available based on a transmitted power prior to data transmission as the UPH measurement. 
     
     
       27. The method of  claim 19 , further comprising utilizing the UPH measurement with a MAC-e scheduler to schedule the UE. 
     
     
       28. The method of  claim 19 , further comprising utilizing the UPH measurement with a MAC-e scheduler to employ at least one of the following: a reduction in time for the E-DCH transmission; a decrease of a collision probability of an E-DCH resource; or a decrease of a blocking probability of an E-DCH resource. 
     
     
       29. A wireless communications apparatus, comprising:
 at least one processor configured to:
 detect an enhanced dedicated channel (E-DCH) transmission in a CELL_FACH state; 
 utilize a reduced measurement period to calculate the UPH measurement associated with the E-DCH transmission within CELL_FACH, wherein the reduced measurement period is less than 100 milliseconds; 
 request the UPH measurement from the UE based upon the reduced measurement period; 
 evaluate a received portion of scheduling information (SI) within a header to identify the requested UPH measurement; and 
 
 a memory coupled to the at least one processor. 
 
     
     
       30. The wireless communications apparatus of  claim 29 , further comprising at least one processor configured to define the UPH measurement as an average value of the UE transmission power headroom over the reduced measurement period. 
     
     
       31. The wireless communications apparatus of  claim 29 , further comprising at least one processor configured to utilize a measurement period of 100 milliseconds to calculate the UPH measurement for a non-CELL_FACH state transmission. 
     
     
       32. The wireless communications apparatus of  claim 29 , further comprising at least one processor configured to utilize a measurement period of 100 milliseconds to calculate the UPH measurement for a non-E-DCH transmission. 
     
     
       33. The wireless communications apparatus of  claim 29 , further comprising at least one processor configured to receive a PRACH preamble from the UE. 
     
     
       34. The wireless communications apparatus of  claim 33 , further comprising at least one processor configured to transmit an AICH to the UE. 
     
     
       35. A wireless communications apparatus that enables receiving an Uplink Power Headroom (UPH) measurement for a user equipment (UE) in CELL_FACH, comprising:
 means for detecting an enhanced dedicated channel (E-DCH) transmission in a CELL_FACH state; 
 means for utilizing a reduced measurement period to calculate the UPH measurement associated with the E-DCH transmission within CELL_FACH, wherein the reduced measurement period is less than 100 milliseconds; 
 means for requesting the UPH measurement from the UE based upon the reduced measurement period; and 
 means for evaluating a received portion of scheduling information (SI) within a header to identify the requested UPH measurement. 
 
     
     
       36. The wireless communications apparatus of  claim 35 , further comprising means for defining the UPH measurement as an average value of the UE transmission power headroom over the reduced measurement period. 
     
     
       37. The wireless communications apparatus of  claim 35 , further comprising means for utilizing a measurement period of 100 milliseconds to calculate the UPH measurement for a non-CELL_FACH state transmission. 
     
     
       38. A non-transitory computer-readable medium encoded with computer executable instructions comprising: code for causing at least one computer to detect an enhanced dedicated channel (E-DCH) transmission in a CELL_FACH state; code for causing at least one computer to utilize a reduced measurement period to calculate the UPH measurement associated with the E-DCH transmission within CELL_FACH, wherein the reduced measurement period is less than 100 milliseconds; code for causing at least one computer to request the UPH measurement from the UE based upon the reduced measurement period; and code for causing at least one computer to evaluate a received portion of scheduling information (SI) within a header to identify the requested UPH measurement. 
     
     
       39. The non-transitory computer-readable medium encoded with computer executable instructions of  claim 38 , wherein the computer readable medium further comprising code for causing the at least one computer to utilize a measurement period of 100 milliseconds to calculate the UPH measurement for a non-CELL_FACH state transmission. 
     
     
       40. The non-transitory computer-readable medium encoded with computer executable instructions of  claim 38 , wherein the computer readable medium further comprising code for causing the at least one computer to utilize a measurement period of 100 milliseconds to calculate the UPH measurement for a non-E-DCH transmission.